Door ding

Blackbelt

I somehow managed to get a door ding low on the driver's side. I can't imagine how as I never park it next to anyone. A dent repair guy said he could fix it but would have to drill into the door from the inside & then massage it out. I researched door dents & dings online and found some interesting remedies. Has anyone tried heating the area with a hair dryer and then immediately dousing it with liquid CO2 from a compressed air can or holding a piece of dry ice in the center of the ding until it pops out? Has anyone had success with the dent repair kits sold at auto parts stores where you glue a plug to the center of the dent and use suction cups to slowly pull out the ding. It's about the size of a nickel and not very deep. Thanks in advance.